fix #2833

git-svn-id: http://svn.osgeo.org/qgis/trunk@13785 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: jef

python/plugins/fTools/tools/doVisual.py

@@ -502,7 +502,7 @@ def isSelfIntersecting( self, polygon ):
         self.emit( SIGNAL( "runPartStatus(PyQt_PyObject)" ), nPart )
 
         count = 0
-        for j in range( i+1, len(h)-1 ):
+        for j in range( i, len(h)-1 ):
           if QgsGeometry().fromPolyline( [ h[ i ], h[ i + 1 ] ] ).intersects( QgsGeometry().fromPolyline( [ h[ j ], h[ j + 1 ] ] ) ):
             count += 1
         if count > 2: